Documents appear after being deleted in Firestore

I experienced similar behaviour today that I haven't seen before. I deleted documents from the Firestore console but my app was still fetching them successfully. Now, about an hour after witnessing that behaviour everything is back to normal and my console deletes are immediately seen on the device.

I'm thinking it was a glitch in Firestore - after all it's still in Beta.

I tried all possible means, I had to back up the whole Firestore DB in Json files then deleted the project from console and created a new one. I think It's an issue with Firestore since I created the project before the launch of Firestore and may have required to create a new one.